Virtualbox Kernal Problem
It seems that every time I upgrade the "Kernal"--I think that is what is called (I'm a Newbie)--my Virtualbox stops working. I found a simple way to correct the problem. Just reinstall Virtualbox and it starts working again without any loss of data.
Re: Virtualbox Kernal Problem
That is because virtualbox uses kernel modules it creates locally against your installed kernel headers. Change the kernel and you have to rebuild the modules. There's a script to do it without reinstalling but it usually fails for me on VB 1.6. Reinstalling definitely works.